Roots Blower

About Roots Blower

A Roots blower is a type of positive displacement blower that is widely used in industrial applications for moving large volumes of air or gases. It works by trapping air between two rotors and displacing it from the intake to the discharge side. The unique "Roots" design, named after its inventors, Brothers Philander and Francis Roots, is characterized by two counter-rotating rotors that mesh but do not touch, creating sealed cavities that move air or gas in a continuous flow.

Key Features of Roots Blowers:

1. Positive Displacement: Roots blowers are positive displacement machines, meaning they move a fixed volume of air per revolution. The air flow is independent of the pressure at the outlet (up to a limit), making it useful in applications where a consistent airflow is needed.

2. Two-Lobe Rotors: Most Roots blowers have two lobes, but some designs use three or more. The lobes rotate in opposite directions and mesh with each other, trapping and moving air through the housing.

3. High Flow, Low Pressure: Roots blowers are generally designed to provide high flow rates but at relatively low pressures (compared to other types of compressors or blowers). They're great for applications requiring large volumes of air or gas with moderate pressure.

4. Reliability: Roots blowers are known for their reliability, simplicity, and durability. They dont require complex seals because the air is moved through mechanical displacement, not compression.

5. Application: Roots blowers are commonly used in applications like:

   • Aeration systems in wastewater treatment plants
   • Material conveying in industries such as cement, plastic pellets, and food products
   • Vacuum and pressure boosting systems
   • Combustion air supply in industrial furnaces
   • Chemical processing where consistent air flow is required
   • Pneumatic conveying of powders or bulk materials

Advantages of Roots Blowers:

• Simple design and ease of maintenance.
• Durability under heavy-duty conditions.
• High flow capacity at low pressure.
• Consistent and pulsation-free airflow.